The fest has drawn in upward of 1.5 million people in the past and, with a lineup like this, don't expect those numbers to dwindle anytime soon. The festival runs from September 13-15 and 19-22 in Rio de Janeiro.

Tickets, additional lineup information and more can be found at the festival's official website.

What do you think? Is that an impressive lineup? Would you go to Rio to see Beyonce perform on the same stage as Metallica? How about Bruce Springsteen and Justin Timberlake? Any of the other bands peak your interest? Is anyone going to Rock In Rio?

Sound off in the comments and stick with Mstarz for the latest on Beyonce, Bruce Springsteen, Justine Timberlake and other music and entertainment news.